My doctor asked me not to breast feed for three days because he wanted to see whether my daughters jaundice was breast milk jaundice or whether it was caused by something more serious. I fell behind in pumping and now my milk supply has lessoned. When I started breast feeding again my breasts were so sore that I continued giving her formula a couple of times a day. I want to cut out the formula completely. Is it possible to get my supply back up with a good pump?